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tdebase/kwin/placement.cpp

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/*****************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
Copyright (C) 1997 to 2002 Cristian Tibirna <tibirna@kde.org>
Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/
#include "placement.h"
#include <qrect.h>
#include <assert.h>
#ifndef KCMRULES
#include "workspace.h"
#include "client.h"
#include "options.h"
#include "rules.h"
#endif
namespace KWinInternal
{
#ifndef KCMRULES
Placement::Placement(Workspace* w)
{
m_WorkspacePtr = w;
reinitCascading( 0 );
}
/*!
Places the client \a c according to the workspace's layout policy
*/
void Placement::place(Client* c, QRect& area )
{
Policy policy = c->rules()->checkPlacement( Default );
if( policy != Default )
{
place( c, area, policy );
return;
}
if( c->isUtility())
placeUtility(c, area, options->placement );
else if( c->isDialog())
placeDialog(c, area, options->placement );
else if( c->isSplash())
placeOnMainWindow( c, area ); // on mainwindow, if any, otherwise centered
else
place(c, area, options->placement);
}
void Placement::place(Client* c, QRect& area, Policy policy, Policy nextPlacement )
{
if( policy == Unknown )
policy = Default;
if( policy == Default )
policy = options->placement;
if( policy == NoPlacement )
return;
else if (policy == Random)
placeAtRandom(c, area, nextPlacement);
else if (policy == Cascade)
placeCascaded(c, area, nextPlacement);
else if (policy == Centered)
placeCentered(c, area, nextPlacement);
else if (policy == ZeroCornered)
placeZeroCornered(c, area, nextPlacement);
else if (policy == UnderMouse)
placeUnderMouse(c, area, nextPlacement);
else if (policy == OnMainWindow)
placeOnMainWindow(c, area, nextPlacement);
else if( policy == Maximizing )
placeMaximizing(c, area, nextPlacement);
else
placeSmart(c, area, nextPlacement);
}
/*!
Place the client \a c according to a simply "random" placement algorithm.
*/
void Placement::placeAtRandom(Client* c, const QRect& area, Policy /*next*/ )
{
const int step = 24;
static int px = step;
static int py = 2 * step;
int tx,ty;
const QRect maxRect = checkArea( c, area );
if (px < maxRect.x())
px = maxRect.x();
if (py < maxRect.y())
py = maxRect.y();
px += step;
py += 2*step;
if (px > maxRect.width()/2)
px = maxRect.x() + step;
if (py > maxRect.height()/2)
py = maxRect.y() + step;
tx = px;
ty = py;
if (tx + c->width() > maxRect.right())
{
tx = maxRect.right() - c->width();
if (tx < 0)
tx = 0;
px = maxRect.x();
}
if (ty + c->height() > maxRect.bottom())
{
ty = maxRect.bottom() - c->height();
if (ty < 0)
ty = 0;
py = maxRect.y();
}
c->move(tx, ty);
}
/*!
Place the client \a c according to a really smart placement algorithm :-)
*/
void Placement::placeSmart(Client* c, const QRect& area, Policy /*next*/ )
{
/*
* SmartPlacement by Cristian Tibirna (tibirna@kde.org)
* adapted for kwm (16-19jan98) and for kwin (16Nov1999) using (with
* permission) ideas from fvwm, authored by
* Anthony Martin (amartin@engr.csulb.edu).
* Xinerama supported added by Balaji Ramani (balaji@yablibli.com)
* with ideas from xfce.
*/
const int none = 0, h_wrong = -1, w_wrong = -2; // overlap types
long int overlap, min_overlap = 0;
int x_optimal, y_optimal;
int possible;
int desktop = c->desktop() == 0 || c->isOnAllDesktops() ? m_WorkspacePtr->currentDesktop() : c->desktop();
int cxl, cxr, cyt, cyb; //temp coords
int xl, xr, yt, yb; //temp coords
int basket; //temp holder
// get the maximum allowed windows space
const QRect maxRect = checkArea( c, area );
int x = maxRect.left(), y = maxRect.top();
x_optimal = x; y_optimal = y;
//client gabarit
int ch = c->height() - 1;
int cw = c->width() - 1;
bool first_pass = true; //CT lame flag. Don't like it. What else would do?
//loop over possible positions
do
{
//test if enough room in x and y directions
if (y + ch > maxRect.bottom() && ch < maxRect.height())
overlap = h_wrong; // this throws the algorithm to an exit
else if(x + cw > maxRect.right())
overlap = w_wrong;
else
{
overlap = none; //initialize
cxl = x; cxr = x + cw;
cyt = y; cyb = y + ch;
ClientList::ConstIterator l;
for(l = m_WorkspacePtr->stackingOrder().begin(); l != m_WorkspacePtr->stackingOrder().end() ; ++l)
{
if((*l)->isOnDesktop(desktop) &&
(*l)->isShown( false ) && (*l) != c)
{
xl = (*l)->x(); yt = (*l)->y();
xr = xl + (*l)->width(); yb = yt + (*l)->height();
//if windows overlap, calc the overall overlapping
if((cxl < xr) && (cxr > xl) &&
(cyt < yb) && (cyb > yt))
{
xl = QMAX(cxl, xl); xr = QMIN(cxr, xr);
yt = QMAX(cyt, yt); yb = QMIN(cyb, yb);
if((*l)->keepAbove())
overlap += 16 * (xr - xl) * (yb - yt);
else if((*l)->keepBelow() && !(*l)->isDock()) // ignore KeepBelow windows
overlap += 0; // for placement (see Client::belongsToLayer() for Dock)
else
overlap += (xr - xl) * (yb - yt);
}
}
}
}
//CT first time we get no overlap we stop.
if (overlap == none)
{
x_optimal = x;
y_optimal = y;
break;
}
if (first_pass)
{
first_pass = false;
min_overlap = overlap;
}
//CT save the best position and the minimum overlap up to now
else if (overlap >= none && overlap < min_overlap)
{
min_overlap = overlap;
x_optimal = x;
y_optimal = y;
}
// really need to loop? test if there's any overlap
if (overlap > none)
{
possible = maxRect.right();
if (possible - cw > x) possible -= cw;
// compare to the position of each client on the same desk
ClientList::ConstIterator l;
for(l = m_WorkspacePtr->stackingOrder().begin(); l != m_WorkspacePtr->stackingOrder().end() ; ++l)
{
if ((*l)->isOnDesktop(desktop) &&
(*l)->isShown( false ) && (*l) != c)
{
xl = (*l)->x(); yt = (*l)->y();
xr = xl + (*l)->width(); yb = yt + (*l)->height();
// if not enough room above or under the current tested client
// determine the first non-overlapped x position
if((y < yb) && (yt < ch + y))
{
if((xr > x) && (possible > xr)) possible = xr;
basket = xl - cw;
if((basket > x) && (possible > basket)) possible = basket;
}
}
}
x = possible;
}
// ... else ==> not enough x dimension (overlap was wrong on horizontal)
else if (overlap == w_wrong)
{
x = maxRect.left();
possible = maxRect.bottom();
if (possible - ch > y) possible -= ch;
//test the position of each window on the desk
ClientList::ConstIterator l;
for(l = m_WorkspacePtr->stackingOrder().begin(); l != m_WorkspacePtr->stackingOrder().end() ; ++l)
{
if((*l)->isOnDesktop(desktop) &&
(*l) != c && c->isShown( false ))
{
xl = (*l)->x(); yt = (*l)->y();
xr = xl + (*l)->width(); yb = yt + (*l)->height();
// if not enough room to the left or right of the current tested client
// determine the first non-overlapped y position
if((yb > y) && (possible > yb)) possible = yb;
basket = yt - ch;
if((basket > y) && (possible > basket)) possible = basket;
}
}
y = possible;
}
}
while((overlap != none) && (overlap != h_wrong) && (y < maxRect.bottom()));
if(ch>= maxRect.height())
y_optimal=maxRect.top();
// place the window
c->move(x_optimal, y_optimal);
}
void Placement::reinitCascading( int desktop )
{ // desktop == 0 - reinit all
if( desktop == 0 )
{
cci.clear();
for( int i = 0; i < m_WorkspacePtr->numberOfDesktops(); i++)
{
DesktopCascadingInfo inf;
inf.pos = QPoint(-1,-1);
inf.col = 0;
inf.row = 0;
cci.append(inf);
}
}
else
{
cci[desktop - 1].pos = QPoint(-1, -1);
cci[desktop - 1].col = cci[desktop - 1].row = 0;
}
}
/*!
Place windows in a cascading order, remembering positions for each desktop
*/
void Placement::placeCascaded (Client* c, QRect& area, Policy nextPlacement)
{
/* cascadePlacement by Cristian Tibirna (tibirna@kde.org) (30Jan98)
*/
// work coords
int xp, yp;
//CT how do I get from the 'Client' class the size that NW squarish "handle"
const int delta_x = 24;
const int delta_y = 24;
const int dn = c->desktop() == 0 || c->isOnAllDesktops() ? (m_WorkspacePtr->currentDesktop() - 1) : (c->desktop() - 1);
// get the maximum allowed windows space and desk's origin
QRect maxRect = checkArea( c, area );
// initialize often used vars: width and height of c; we gain speed
const int ch = c->height();
const int cw = c->width();
const int X = maxRect.left();
const int Y = maxRect.top();
const int H = maxRect.height();
const int W = maxRect.width();
if( nextPlacement == Unknown )
nextPlacement = Smart;
//initialize if needed
if (cci[dn].pos.x() < 0 || cci[dn].pos.x() < X || cci[dn].pos.y() < Y )
{
cci[dn].pos = QPoint(X, Y);
cci[dn].col = cci[dn].row = 0;
}
xp = cci[dn].pos.x();
yp = cci[dn].pos.y();
//here to touch in case people vote for resize on placement
if ((yp + ch) > H) yp = Y;
if ((xp + cw) > W)
if (!yp)
{
place(c,area,nextPlacement);
return;
}
else xp = X;
//if this isn't the first window
if (cci[dn].pos.x() != X && cci[dn].pos.y() != Y)
{
/* The following statements cause an internal compiler error with
* egcs-2.91.66 on SuSE Linux 6.3. The equivalent forms compile fine.
* 22-Dec-1999 CS
*
* if (xp != X && yp == Y) xp = delta_x * (++(cci[dn].col));
* if (yp != Y && xp == X) yp = delta_y * (++(cci[dn].row));
*/
if (xp != X && yp == Y)
{
++(cci[dn].col);
xp = delta_x * cci[dn].col;
}
if (yp != Y && xp == X)
{
++(cci[dn].row);
yp = delta_y * cci[dn].row;
}
// last resort: if still doesn't fit, smart place it
if (((xp + cw) > W - X) || ((yp + ch) > H - Y))
{
place(c,area,nextPlacement);
return;
}
}
// place the window
c->move(QPoint(xp, yp));
// new position
cci[dn].pos = QPoint(xp + delta_x, yp + delta_y);
}
/*!
Place windows centered, on top of all others
*/
void Placement::placeCentered (Client* c, const QRect& area, Policy /*next*/ )
{
// get the maximum allowed windows space and desk's origin
const QRect maxRect = checkArea( c, area );
const int xp = maxRect.left() + (maxRect.width() - c->width()) / 2;
const int yp = maxRect.top() + (maxRect.height() - c->height()) / 2;
// place the window
c->move(QPoint(xp, yp));
}
/*!
Place windows in the (0,0) corner, on top of all others
*/
void Placement::placeZeroCornered(Client* c, const QRect& area, Policy /*next*/ )
{
// get the maximum allowed windows space and desk's origin
const QRect maxRect = checkArea( c, area );
// place the window
c->move(QPoint(maxRect.left(), maxRect.top()));
}
void Placement::placeUtility(Client* c, QRect& area, Policy /*next*/ )
{
// TODO kwin should try to place utility windows next to their mainwindow,
// preferably at the right edge, and going down if there are more of them
// if there's not enough place outside the mainwindow, it should prefer
// top-right corner
// use the default placement for now
place( c, area, Default );
}
void Placement::placeDialog(Client* c, QRect& area, Policy nextPlacement )
{
placeOnMainWindow( c, area, nextPlacement );
}
void Placement::placeUnderMouse(Client* c, QRect& area, Policy /*next*/ )
{
area = checkArea( c, area );
QRect geom = c->geometry();
geom.moveCenter( QCursor::pos());
c->move( geom.topLeft());
c->keepInArea( area ); // make sure it's kept inside workarea
}
void Placement::placeOnMainWindow(Client* c, QRect& area, Policy nextPlacement )
{
if( nextPlacement == Unknown )
nextPlacement = Centered;
if( nextPlacement == Maximizing ) // maximize if needed
placeMaximizing( c, area, NoPlacement );
area = checkArea( c, area );
ClientList mainwindows = c->mainClients();
Client* place_on = NULL;
Client* place_on2 = NULL;
int mains_count = 0;
for( ClientList::ConstIterator it = mainwindows.begin();
it != mainwindows.end();
++it )
{
if( mainwindows.count() > 1 && (*it)->isSpecialWindow())
continue; // don't consider toolbars etc when placing
++mains_count;
place_on2 = *it;
if( (*it)->isOnCurrentDesktop())
{
if( place_on == NULL )
place_on = *it;
else
{ // two or more on current desktop -> center
// That's the default at least. However, with maximizing placement
// policy as the default, the dialog should be either maximized or
// made as large as its maximum size and then placed centered.
// So the nextPlacement argument allows chaining. In this case, nextPlacement
// is Maximizing and it will call placeCentered().
place( c, area, Centered );
return;
}
}
}
if( place_on == NULL )
{ // 'mains_count' is used because it doesn't include ignored mainwindows
if( mains_count != 1 )
{
place( c, area, Centered );
return;
}
place_on = place_on2; // use the only window filtered together with 'mains_count'
}
if( place_on->isDesktop())
{
place( c, area, Centered );
return;
}
QRect geom = c->geometry();
geom.moveCenter( place_on->geometry().center());
c->move( geom.topLeft());
// get area again, because the mainwindow may be on different xinerama screen
area = checkArea( c, QRect());
c->keepInArea( area ); // make sure it's kept inside workarea
}
void Placement::placeMaximizing(Client* c, QRect& area, Policy nextPlacement )
{
if( nextPlacement == Unknown )
nextPlacement = Smart;
if( c->isMaximizable() && c->maxSize().width() >= area.width() && c->maxSize().height() >= area.height())
{
if( m_WorkspacePtr->clientArea( MaximizeArea, c ) == area )
c->maximize( Client::MaximizeFull );
else // if the geometry doesn't match default maximize area (xinerama case?),
{ // it's probably better to use the given area
c->setGeometry( area );
}
}
else
{
c->resizeWithChecks( c->maxSize().boundedTo( area.size()));
place( c, area, nextPlacement );
}
}
QRect Placement::checkArea( const Client* c, const QRect& area )
{
if( area.isNull())
return m_WorkspacePtr->clientArea( PlacementArea, c->geometry().center(), c->desktop());
return area;
}
#endif
Placement::Policy Placement::policyFromString( const QString& policy, bool no_special )
{
if( policy == "NoPlacement" )
return NoPlacement;
else if( policy == "Default" && !no_special )
return Default;
else if( policy == "Random" )
return Random;
else if( policy == "Cascade" )
return Cascade;
else if( policy == "Centered" )
return Centered;
else if( policy == "ZeroCornered" )
return ZeroCornered;
else if( policy == "UnderMouse" && !no_special)
return UnderMouse;
else if( policy == "OnMainWindow" && !no_special)
return OnMainWindow;
else if( policy == "Maximizing" )
return Maximizing;
else
return Smart;
}
const char* Placement::policyToString( Policy policy )
{
const char* const policies[] =
{ "NoPlacement", "Default", "XXX should never see", "Random", "Smart", "Cascade", "Centered",
"ZeroCornered", "UnderMouse", "OnMainWindow", "Maximizing" };
assert( policy < int( sizeof( policies ) / sizeof( policies[ 0 ] )));
return policies[ policy ];
}
#ifndef KCMRULES
// ********************
// Workspace
// ********************
/*!
Moves active window left until in bumps into another window or workarea edge.
*/
void Workspace::slotWindowPackLeft()
{
if( active_client && active_client->isMovable())
active_client->move( packPositionLeft( active_client, active_client->geometry().left(), true ),
active_client->y());
}
void Workspace::slotWindowPackRight()
{
if( active_client && active_client->isMovable())
active_client->move(
packPositionRight( active_client, active_client->geometry().right(), true )
- active_client->width() + 1, active_client->y());
}
void Workspace::slotWindowPackUp()
{
if( active_client && active_client->isMovable())
active_client->move( active_client->x(),
packPositionUp( active_client, active_client->geometry().top(), true ));
}
void Workspace::slotWindowPackDown()
{
if( active_client && active_client->isMovable())
active_client->move( active_client->x(),
packPositionDown( active_client, active_client->geometry().bottom(), true ) - active_client->height() + 1 );
}
void Workspace::slotWindowGrowHorizontal()
{
if( active_client )
active_client->growHorizontal();
}
void Client::growHorizontal()
{
if( !isResizable() || isShade())
return;
QRect geom = geometry();
geom.setRight( workspace()->packPositionRight( this, geom.right(), true ));
QSize adjsize = adjustedSize( geom.size(), SizemodeFixedW );
if( geometry().size() == adjsize && geom.size() != adjsize && xSizeHint.width_inc > 1 ) // take care of size increments
{
int newright = workspace()->packPositionRight( this, geom.right() + xSizeHint.width_inc - 1, true );
// check that it hasn't grown outside of the area, due to size increments
// TODO this may be wrong?
if( workspace()->clientArea( MovementArea,
QPoint(( x() + newright ) / 2, geometry().center().y()), desktop()).right() >= newright )
geom.setRight( newright );
}
geom.setSize( adjustedSize( geom.size(), SizemodeFixedW ));
setGeometry( geom );
}
void Workspace::slotWindowShrinkHorizontal()
{
if( active_client )
active_client->shrinkHorizontal();
}
void Client::shrinkHorizontal()
{
if( !isResizable() || isShade())
return;
QRect geom = geometry();
geom.setRight( workspace()->packPositionLeft( this, geom.right(), false ));
if( geom.width() <= 1 )
return;
geom.setSize( adjustedSize( geom.size(), SizemodeFixedW ));
if( geom.width() > 20 )
setGeometry( geom );
}
void Workspace::slotWindowGrowVertical()
{
if( active_client )
active_client->growVertical();
}
void Client::growVertical()
{
if( !isResizable() || isShade())
return;
QRect geom = geometry();
geom.setBottom( workspace()->packPositionDown( this, geom.bottom(), true ));
QSize adjsize = adjustedSize( geom.size(), SizemodeFixedH );
if( geometry().size() == adjsize && geom.size() != adjsize && xSizeHint.height_inc > 1 ) // take care of size increments
{
int newbottom = workspace()->packPositionDown( this, geom.bottom() + xSizeHint.height_inc - 1, true );
// check that it hasn't grown outside of the area, due to size increments
if( workspace()->clientArea( MovementArea,
QPoint( geometry().center().x(), ( y() + newbottom ) / 2 ), desktop()).bottom() >= newbottom )
geom.setBottom( newbottom );
}
geom.setSize( adjustedSize( geom.size(), SizemodeFixedH ));
setGeometry( geom );
}
void Workspace::slotWindowShrinkVertical()
{
if( active_client )
active_client->shrinkVertical();
}
void Client::shrinkVertical()
{
if( !isResizable() || isShade())
return;
QRect geom = geometry();
geom.setBottom( workspace()->packPositionUp( this, geom.bottom(), false ));
if( geom.height() <= 1 )
return;
geom.setSize( adjustedSize( geom.size(), SizemodeFixedH ));
if( geom.height() > 20 )
setGeometry( geom );
}
int Workspace::packPositionLeft( const Client* cl, int oldx, bool left_edge ) const
{
int newx = clientArea( MovementArea, cl ).left();
if( oldx <= newx ) // try another Xinerama screen
newx = clientArea( MovementArea,
QPoint( cl->geometry().left() - 1, cl->geometry().center().y()), cl->desktop()).left();
if( oldx <= newx )
return oldx;
for( ClientList::ConstIterator it = clients.begin();
it != clients.end();
++it)
{
if( !(*it)->isShown( false ) || !(*it)->isOnDesktop( active_client->desktop()))
continue;
int x = left_edge ? (*it)->geometry().right() + 1 : (*it)->geometry().left() - 1;
if( x > newx && x < oldx
&& !( cl->geometry().top() > (*it)->geometry().bottom() // they overlap in Y direction
|| cl->geometry().bottom() < (*it)->geometry().top()))
newx = x;
}
return newx;
}
int Workspace::packPositionRight( const Client* cl, int oldx, bool right_edge ) const
{
int newx = clientArea( MovementArea, cl ).right();
if( oldx >= newx ) // try another Xinerama screen
newx = clientArea( MovementArea,
QPoint( cl->geometry().right() + 1, cl->geometry().center().y()), cl->desktop()).right();
if( oldx >= newx )
return oldx;
for( ClientList::ConstIterator it = clients.begin();
it != clients.end();
++it)
{
if( !(*it)->isShown( false ) || !(*it)->isOnDesktop( cl->desktop()))
continue;
int x = right_edge ? (*it)->geometry().left() - 1 : (*it)->geometry().right() + 1;
if( x < newx && x > oldx
&& !( cl->geometry().top() > (*it)->geometry().bottom()
|| cl->geometry().bottom() < (*it)->geometry().top()))
newx = x;
}
return newx;
}
int Workspace::packPositionUp( const Client* cl, int oldy, bool top_edge ) const
{
int newy = clientArea( MovementArea, cl ).top();
if( oldy <= newy ) // try another Xinerama screen
newy = clientArea( MovementArea,
QPoint( cl->geometry().center().x(), cl->geometry().top() - 1 ), cl->desktop()).top();
if( oldy <= newy )
return oldy;
for( ClientList::ConstIterator it = clients.begin();
it != clients.end();
++it)
{
if( !(*it)->isShown( false ) || !(*it)->isOnDesktop( cl->desktop()))
continue;
int y = top_edge ? (*it)->geometry().bottom() + 1 : (*it)->geometry().top() - 1;
if( y > newy && y < oldy
&& !( cl->geometry().left() > (*it)->geometry().right() // they overlap in X direction
|| cl->geometry().right() < (*it)->geometry().left()))
newy = y;
}
return newy;
}
int Workspace::packPositionDown( const Client* cl, int oldy, bool bottom_edge ) const
{
int newy = clientArea( MovementArea, cl ).bottom();
if( oldy >= newy ) // try another Xinerama screen
newy = clientArea( MovementArea,
QPoint( cl->geometry().center().x(), cl->geometry().bottom() + 1 ), cl->desktop()).bottom();
if( oldy >= newy )
return oldy;
for( ClientList::ConstIterator it = clients.begin();
it != clients.end();
++it)
{
if( !(*it)->isShown( false ) || !(*it)->isOnDesktop( cl->desktop()))
continue;
int y = bottom_edge ? (*it)->geometry().top() - 1 : (*it)->geometry().bottom() + 1;
if( y < newy && y > oldy
&& !( cl->geometry().left() > (*it)->geometry().right()
|| cl->geometry().right() < (*it)->geometry().left()))
newy = y;
}
return newy;
}
/*!
Asks the internal positioning object to place a client
*/
void Workspace::place(Client* c, QRect& area)
{
initPositioning->place( c, area );
}
void Workspace::placeSmart(Client* c, const QRect& area)
{
initPositioning->placeSmart( c, area );
}
#endif
} // namespace
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